McNamara, B. J. (1997). Investigating astronomy: Model building and critical thinking. Mosby.
Lua i Stíl Chicago (17ú heag.)McNamara, Bernard J. Investigating Astronomy: Model Building and Critical Thinking. St. Louis: Mosby, 1997.
Lua MLA (9ú heag.)McNamara, Bernard J. Investigating Astronomy: Model Building and Critical Thinking. Mosby, 1997.
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